The exoskeleton legs are a part of the Trahaearn exoskeleton set. It is a reward from Plague's End grandmaster quest.
Wearing the full set, which consists of a headband, torso, legs, and bracers, gives the following bonuses:
- 25% chance to avoid being stunned and damaged while pickpocketing.
- 25% chance to avoid being bitten when looting urns in Pyramid Plunder.
- The same benefits as Black Ibis from Pyramid Plunder if the player has unlocked it.
- Bracers: +5% success bonus when pickpocketing (requires 75 Hunting, 75 Thieving).
- All pieces reduce weight by 2kg each.
The legs can be reclaimed from Arianwyn in Lletya if they are lost. The full set can be stored in a player-owned house's armour case.